GM Service Manual Online
For 1990-2009 cars only

Begin the system diagnosis by reviewing the appropriate system Description and Operation. Refer to the following:

    •  Audible Warnings Description and Operation
    •  Indicator/Warning Message Description and Operation
    •  Instrument Cluster Description and Operation

Reviewing the Description and Operation information will help you determine the following:

    • The correct symptom diagnostic procedure, when a malfunction exists.
    • The condition described by the customer is the normal operation of the system.

Refer to Symptoms - Instrument Panel, Gages and Console in order to identify the correct procedure for diagnosing the system and where the procedure is located.